Samir Bouaziz
/
Exemple_CAN1
communication CAN avec affichage sur console
main.cpp
- Committer:
- bouaziz
- Date:
- 2011-02-17
- Revision:
- 0:79662ac4d61a
File content as of revision 0:79662ac4d61a:
#include "mbed.h" #include "CAN.h" LocalFileSystem local("local"); Ticker ticker; DigitalOut led1(LED1); DigitalOut led2(LED2); DigitalOut led3(LED3); DigitalOut led4(LED4); // CAN_RS pin at Philips PCA82C250 can bus controller. // activate transceiver by pulling this pin to GND. // (Rise and fall slope controlled by resistor R_s) // (+5V result in tranceiver standby mode) // For further information see datasheet page 4 //DigitalOut can_Pca82c250SlopePin(p28); // second can controller on these pins. Not used here. // CAN can1(p9, p10); // We use can on mbed pins 29(CAN_TXD) and 30(CAN_RXD). CAN can2(p30, p29); Serial pc(p13,p14); FILE *fp ; unsigned int flag=0; void send() { static char counter = 0; if (can2.write(CANMessage(0x200, &counter, 1))) { // LPC_CAN2->CMR &= 0xEF; // stop back Tx pc.printf("CanTx--> id: 0x200 dlc: 1 data: %x\n\r", counter); counter++; } // toggle led1 after every transmission led1 = !led1; } int main() { // 500kbit/s can2.frequency(500000); // every 500ms ticker.attach(&send, 0.5); /// create message object for message reception CANMessage can_MsgRx; pc.baud(38400); pc.format(8,Serial::None,1); while (1) { // send received messages to the pc via serial line (9k6, 8n1) if (can2.read(can_MsgRx)) { led3= can_MsgRx.data[0]&0x01; led4= (can_MsgRx.data[0]&0x02)>>1; // any incoming message: toggle led2 pc.printf("Receive %3x %2u\n\r",can_MsgRx.id,can_MsgRx.len); led2 = !led2; } } }